Replicate CLAUDE.md contribution guidelines and commit-msg hook from kagenti/.github

[rubambiza]

Summary

Replicate the contribution-guidelines setup that was added to the kagenti/.github repo (merged in PR #79) onto this kagenti/automation repo, and replicate the org workflow callers used in kagenti/kagenti.

The kagenti/.github repo now has a merged CLAUDE.md documenting:

• DCO Sign-Off (mandatory -s)
• Commit Attribution Policy (Assisted-By, never Co-authored-by)
• PR Description Attribution (Assisted-By: Claude Code)
• Scope Discipline

It also references a commit-msg hook at scripts/hooks/commit-msg that enforces the attribution policy automatically.

This repo currently has NEITHER a CLAUDE.md nor the commit-msg hook, and is missing the org workflow callers.

Tasks

• Add CLAUDE.md (adapted title for the Automation repo) replicating the merged kagenti/.github content
• Add executable scripts/hooks/commit-msg hook (verbatim from kagenti/.github)
• Replicate .github/workflows/self-assign.yml from kagenti/kagenti
• Replicate .github/workflows/project.yml from kagenti/kagenti
• Replicate .github/workflows/pr-verifier.yml from kagenti/kagenti

The three workflows are thin callers to org-wide reusable workflows in kagenti/.github, so they replicate cleanly with no repo-specific changes.

Reference

• Source repo: kagenti/.github (CLAUDE.md + hook)
• Source PR: chore: add CLAUDE.md with contribution guidelines .github#79
• Source workflows: kagenti/kagenti .github/workflows/{self-assign,project,pr-verifier}.yml

Assisted-By: Claude Code

[rubambiza]

Closed through #16